Indominus Rex
Posted by Nexus on June 14, 2014 (Updated: 09-Aug-2026)
The Indominus Rex, also known originally as Diabolus-Rex or D-Rex, is the nickname given to a genetically created hybrid dinosaur that is the villain in the 2015 Jurassic World movie. It has a mixture of DNA from various dinosaurs, including the Tyrannosaurus Rex and a Velociraptor and was created as a new attraction for the park.
DNA & Abilities
Tyrannosaurus Rex
The T-Rex forms the basis of the Indominus Rex and it looks and moves quite similar to the T-Rex. You’ll easily be familiar with its huge, powerful jaw and tail.
Other Theropods
The Indominus Rex has various features from Abelisaurs, which improve upon the Tyrannosaurus Rex and make the I-Rex bigger and stronger. The dinosaur incorporated DNA from a Giganotosaurus to make it bigger; a Majungasaurus for more teeth; a Rugops for its bony osteoderms and a Carnotaurus, which gives it the horns above the eye orbit.
Cuttlefish
Cuttlefish had an interesting ability where it can change the colour of its skin at will. This gives the Indominus Rex a massive advantage at camouflaging with its environment, allowing it to hide in plain sight.
Tree Frog
The tree frog’s DNA allow the Indominus Rex to alter its body temperature. This allows the Indominus Rex to avoid infrared detection used by the Park’s security.
Pit Adder
As we know, the Tyrannosaurus Rex’s vision is based on movement. However, due to the Adder’s DNA, the Indominus Rex can see in infrared vision, allowing it to spot heat signatures from its prey.
Velociraptor
The last confirmed creature is the Velociraptor, which gives the Indominus Rex superior intelligence. In Jurassic World, the dinosaur can see weaknesses in its enclosure and actually set a trap to kill its prey and escape. The Raptor DNA also allows it to communicate with the Velociraptors and it becomes the Alpha Raptor for a short time.
Unknown Abilities
- It’s assumed another modern creature was used to give the Indominus Rex opposable thumbs, giving it better hand movements such as the ability to grasp onto its prey.
- It’s also speculated that the creature has some kind of electromagnetic ability to interfere with radio and mobile signals, as many times throughout Jurassic World, the characters had trouble communicating via radios.
Jurassic World
InGen CEO Simon Masrani funded the creation of the Indominus Rex as a new park attraction; however, the InGen board had more sinister intentions and wanted to use the dinosaur as a military weapon. Dr Wu didn’t divulge what DNA went into creating the Indominus Rex, as the intention was to create a lethal killing weapon for InGen. The idea was to deploy the dinosaur at night with infrared vision and was able to stay hidden from enemies (through its camouflaging and thermoregulation abilities).
In Jurassic World, it is said that the Indominus Rex killed its sibling at some point. Simon Masrani arrives at the attraction and tells Claire Dearing that he wants Owen to check its enclosure for vulnerabilities. When Owen and two other park employees explore its enclosure, it’s assumed the Indominus Rex has scaled the wall and escaped. Instead, the dinosaur sets a trap and ambushes them. It kills the two employees and escapes its enclosure, with Owen managing to hide.
The security team attempts to capture the dinosaur, but it tears them apart. Later, the two kids, Gray and Zach, are in the Gyrosphere and are attacked by the Indominus Rex. They narrowly manage to escape by jumping off a waterfall. Claire and Owen arrive at the old Visitor’s Center and are attacked by the dinosaur. Simon Masrani flies a helicopter and attacks the creature from the air as it runs into the aviary. Many pterosaurs escape and cause the helicopter to crash through the aviary.
The security team decide to use the Velociraptors against the Indominus Rex, but unknown to them, it’s revealed that the creature has Raptor DNA. It is able to communicate with the Raptors and orders them to attack the security team. Owen later manages to reconnect with the Velociraptors and orders them to kill the Indominus Rex. The Raptors attack but are easily overpowered by the dinosaur and seemingly killed. Claire opens up the Tyrannosaurus paddock and leads it back to the Indominus Rex.
The two dinosaurs engage in a ferocious battle, with the Indominus Rex having the upper hand. As it is about to kill the Tyrannosaurus, the Velociraptor “Blue” reappears and attacks it. This enables the Tyrannosaurus to re-engage in battle. As they push the I-Rex to the lagoon, the Mosasaurus bursts out of the water and drags the Indominus Rex to the bottom of the lagoon, killing it once and for all.

